html, body {
    margin: 0;
    padding: 0;
    height: 100%; /* Ensure the body fills the viewport */
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  }
  
  #chartdiv {
    width: 100%;
    height: 100vh; /* Full height of the viewport */
  }